Shuttle block



March '15, 1927. 1,621,439

F. H. STETSON I SHUTTLE BLOCK Filed Dec. 1. 1922 I/ //Z y and catch in the same way.

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Application filed December This invention relates to shuttles of the type wherein a metal threading block is inserted and fastened in a wooden shuttle.

With automatic or self threading shuttles.

such blocks generally have a sloping or curved guiding front edge 'which extends backwardly along andincooperation with a yarn passage which connects with the eye in the side, and as now made this front edge terminates in a downwardly pro ecting tongue which,'together with a diagonal slopand if there is even a slight crack or space the yarn catches therein and breaks. Occa- .sionally, it mayslip up after being threaded Broadly, his invention consists of positioned at the under outer edge at the point of contact between the wood and the metal which can be forced into the wood when the block is put in place whereby the yarn cannot catch if the joint is originally not tight, nor even if the wood afterwards shrinks away from the metal, I

In the drawings, Figure 1 is a plan view of the front or eye end of an automatic shuttle with a threading block in position;

Fig. 2 is a side elevation of a similar shuttle with the threading block raised a short distance to show the relation of the parts. i

Fig. 3 is a detail from below, and in front from the direction of the arrow in Fig. 2,

. L Il'llglil) be made to fit tooth K before the of the tongue and tooth. I Fig. 4 is a detail from the bottom showing the tooth.

Fig. 5 is a View similar to Fig. 2 with the threading block forced into place and locked or fastened in osition.

Fig. 6 is a view similar to-Fig. 3 showing the tooth and the depression which it makes in the wood.'

Fig. 7 is a detail view similar to Fig. 5

showing a tongue and tooth where the tongue projects slightly over the wood.

In the drawings,'A represents a wooden shuttle with a tip 4 having-an eye H in the 7 side with the usual pins 17, 17 and a yarn passage extending between 16 and 19 to the threading chamber12. This thread ng down forwardly of the yarn forms a "a tooth SHUTZDLE Bnocri.

1, 922. seriarjnoz eoaaso chamber extends back to and connects with the: bobbin chamber l'which is cut out to receive the bobbin'B from which the yarn C is unwound. There is also a recess indicated by E to receive the threading block F. This threading block extends forward at 39 to a hook or point and has the usual horn D at the forward end which extends passage from l6, 19 to 12, and has a guiding top front edge 32 which extends backwardly along and in cooperation with said yarn passage. This front edge 32extends downwardly to a bottom straight front edge 30 and terminates in a downwardly projecting tongue 34 which point at the back of front edge 32, the end of bottom edge 30, and the front ofback edge 33 of a wing 31 whichcurves is straight at 10 tofit the bottom edge 30 of block D and at 15'comes tosubstantially a point, coinciding with the point of tongue 34.

It is in this place that the yarn is likely to catch, and to prevent catching I provide at the bottom of the outer. forward end of the tongue 34 a tooth K which, as shown clearly in-Figs. 2 and 5 and 3 and 6, when the threading block F is forced into position,

makes its own depression or groove Lin the wood. The block is locked in place by means of ascrew, such as S, which passes through a hole 7 in'th'e shuttle and through the threading block.

It is obvious'that the depression or groove block D is put inplace, but this is unnecessary.

Beingpreferably of V shape, even if the wood shrinks awayfrom the block D, the

having an eye in the side and a yarn passageextending therefrom to a threading chamber, of a threading block which has a horn at the forward end which extends down forwardly of said yarn passage and has a guiding front edge extending backwardly along and in cooperation with said yarn passage and terminating in a downwardly projecting tongue which engages the wood of the shuttle, said tongue having at the bottom of the outer forward end a tooth which projects down and back and is forced into the Wood.

front edgewhich terminates in a downward- 1y t projecting tongue which engages the Wood of the shuttle, said tongue having a tooth which projects down and back at the 15 bottom, and is forced into the wood,

FRANK H. STETSO'N. 

